More suitable for people who often work with their fingers and often go out. Double fixation and free to adjust the size of the bracelet to make it suitable for your wrist size. Small size of the grip ball can be easily put in the pocket, or taken out to kill time on the trip or in the car. High elastic band without wrist tightening, flexible rolling for convenient holding. Made of a durable, highelastic silicone material, flexible hand feelings and suitable for all ages. Feature:1. Small size of the grip ball can be easily put in the pocket, or taken out to kill time on the trip or in the car. 2. More suitable for people who often work with their fingers and often go out. 3. High elastic band without wrist tightening, flexible rolling for convenient holding. 4. Double fixation and free to adjust the size of the bracelet to make it suitable for your wrist size. 5. Made of a durable, highelastic silicone material, flexible hand feelings and suitable for all ages. Spec:Condition: 100 percent Brand New Item Type: Grip Ball Material: Silicone Function: 1. Rehabilitation training 2. Activities calcined knuckles, palm muscles 3. Pressure finger, activating joint 4. Build finger and arm strength Usage: The size of the grip ball is not large, just in the palm of the hand, hold the ball, hard pinch, you can feel the pressure of the grip ball brought to the fingers.Generally continue to hold many times, you can feel the palm numbness and fever, and then it is very comfortable feeling. Because when pinching the ball, the flexible ball is deformed and filled with the palm, the palm is loose and tight, the ball can effectively the major acupoints of the palm, promote blood circulation, and achieve the effect of exercise and healthy care. Basic Exercise: Hold the ball completely in the palm of your hand and do ten times hand stretching exercises, first with your right hand and then with your left hand, alternating. Applicable population: 1. Climbers and bodybuilders training finger strength and grip strength 2. Fans of badminton, table tennis, basketball and other ball games 3. Learn to play the piano to exercise finger strength 4. People use computer keyboard and f